John earding



Y the application, employment,

ffice.

s, f mich tetra garrot IMPROVED LOGKrFASTENER FOR LAMPS.-

@la tlgrhule referat tu in there itnitrrs atmt aut making, putt nf tip: same.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, JOHN HARDING, of Warrington, in the county of Lancaster, and Kingdom of Great Britain, have invented a new and improved Lock or ,Fastener for Lamps; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

l The invention is designed to supply such afastener or lock to lamps, similar to Davy-lamps used for mining purposes, that when once it is closed it cannot again be opened, except by the destruction of the fast- -ening,-and such i'astening cannot be replaced, or a new one substituted, except by an authorized person. The surreptitious opening of a'lamp would invariably bershown to the lamp-examiner. l

The improvements consist in the application and use of a bolt or rivet, to be made of lead or soft inet-al, gutta. perche, or other suitable soft, cheap material. The ordinaryr slotted plate and staple are used on the lamp instead of a padlock being passed through the staple. One of these rivets is passed through and riveted by compressing or clnching the' rivet between a'pair of hinged levers, which; heilig supplied with a die or stamp, simultaneously secures t to trim the lamp.

In order that the invention may be better understood and explained in detail, I have hereunto attached a sheet of drawings, made` about the full size. l i

Figure 1 represents a side elevation ofan ordinary Davy-lamp, having applied thereto the rivetfastening, which is employed instead of a lock.

Figure 2 represents a front elevation of the same.

a a is the" body of the lamp, and b b the wire-gauze covering and top-fittings of the lamp; e is a staple,

secured to the body of the lamp a., over which the slotted latch d, secured to the top-fittings I), falls, and which,

when down, allows a lead rivet, o, to be passed through 4the staple e, which, when clinched as seen in fig. 2,

rmly secures the latch.

Having now described the nature of the said invention, I wish it to be distinctly understood that I claim and use of a soft-metal or other rivet, or other compressible plug, as a fastening for safety-lamps, instead of locks, screws, or other mechanical contrivances now employed.,

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN HARDING.

Witnesses:

JOHN L. DAvms, JNO. HUGHES.

he lamp-covenand impresses a mark or seal on one or both ends of the rivet. The examiner, or authorized supervisor, cuts through /the soft rivet with cutting-pincers, when necessary 

